Wash hair with clarifying shampoo 2 times. Dry hair 100% with hairdryer. Apply the product evenly, half centimeter from the root to tip, dry hair with a hairdryer and hair brush. Procede to apply the iron to seal the cuticle. Let it work 20 to 40 minutes, depending on the results you wish to achieve. Wash hair using a Sulfate-Free Shampoo. Dry hair with a hairdryer and hair brush.Finally Procede to apply the iron to seal the cuticle.